main.go

/*

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package main

import (
	"flag"
	"fmt"
	"os"

	"k8s.io/apimachinery/pkg/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"

	nrv1 "github.com/newrelic/newrelic-kubernetes-operator/api/v1"
	"github.com/newrelic/newrelic-kubernetes-operator/internal/info"
	// +kubebuilder:scaffold:imports
)

var (
	scheme   = runtime.NewScheme()
	setupLog = ctrl.Log.WithName("setup")
)

func init() {
	_ = clientgoscheme.AddToScheme(scheme)

	_ = nrv1.AddToScheme(scheme)
	// +kubebuilder:scaffold:scheme
}

func main() {
	var metricsAddr string
	var enableLeaderElection bool
	var showVersion bool
	var devMode bool

	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
	flag.BoolVar(&enableLeaderElection, "enable-leader-election", false, "Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.")
	flag.BoolVar(&showVersion, "version", false, "Show version information.")
	flag.BoolVar(&devMode, "dev-mode", false, "Enable development level logging (stacktraces on warnings, no sampling)")
	flag.Parse()

	if showVersion {
		fmt.Printf("%s version %s\n", info.Name, info.Version)
		os.Exit(0)
	}

	logger := zap.New(zap.UseDevMode(devMode))
	ctrl.SetLogger(logger)

	opts := ctrl.Options{
		Scheme:             scheme,
		MetricsBindAddress: metricsAddr,
		LeaderElection:     enableLeaderElection,
		LeaderElectionID:   "newrelic-kubernetes-operator",
		Port:               9443,
	}

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), opts)
	if err != nil {
		setupLog.Error(err, "unable to create manager")
		os.Exit(1)
	}

	// initialize NR go agent
	nrApp := InitializeNRAgent()

	//Register Alerts
	err = registerAlerts(&mgr, &nrApp)
	if err != nil {
		setupLog.Error(err, "unable to register alerts")
		os.Exit(1)
	}

	// This marker is used by kubebuilder and must remain in main.go but generated code should be refactored to another class as appropriate
	// This can likely be refactored once https://github.com/kubernetes-sigs/kubebuilder/blob/master/designs/simplified-scaffolding.md is completed
	// +kubebuilder:scaffold:builder

	setupLog.Info("starting manager")
	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}